Scope provider implementation to demonstrate how you can created a nested scope with elements in it.

Recursing_Through_Parents.java

/** 
* In the implementation of the scope provider, we create a nested scope, where each scope contains the fields from the given Clazz.
**/


override IScope getScope(EObject context, EReference eReference) {
  if (reference == MyDslPackage.Literals.REF_TO_FIELD_FIELD) {
    return clazzScope(context.getContainerOfType(Clazz));
  }
  return super.getScope(context, eReference);
}

private IScope clazzScope(Class clazz) {
  if (clazz != null) {
    Scopes.scopeFor(clazz.features.filter(Field), clazzScope(clazz.superType));
  } else {
    return IScope.NULLSCOPE;
  }
}